/*
 * Copyright 2002-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.amqp.core;

/**
 * Constants for the standard Exchange type names.
 *
 * @author Mark Fisher
 * @author Gary Russell
 */
public abstract class ExchangeTypes {

	public static final String DIRECT = "direct";

	public static final String TOPIC = "topic";

	public static final String FANOUT = "fanout";

	public static final String HEADERS = "headers";

	public static final String SYSTEM = "system";

	/**
	 * The constant to represent {@code x-delayed-message} exchange mode.
	 * @deprecated since 1.6.4, it's not a user-available exchange type,
	 * the delayed {@code boolean} is used for that.
	 */
	@Deprecated
	public static final String DELAYED = "x-delayed-message";
}
